Polyvinyl chloride resin plasticized with 1, 5-pentanediol difuroate



. mama 18, 1950 uumzn s'm'r zs PATENT OFFICE POLYVINYL CHLORIDE RESIN PLASTICIZED,

, WITH LS-PENTAN EDIOLDIFUBOA TE Stanford J. Hetzei, Cheltenham, Pa., mi htito Sun Oil Company, Philadelphia, Pa., a corporation oi New Jersey No Drawing.' Application August 25, 1948, Serial No. 48,188

2 Claims. (Cl. 260-303) Thepresent invention relates to a plasticized polyvinyl resin. Specifically it relates to a polyvinyl chloride resin in plasticized composition with 1,5-pentanediol diiuroate.

In" copending application for patent Serial No. 46,183, flied by the instant inventor, August 25, 1948, the foregoing ester and its method of preparation are described and claimed. According to that application the ester was prepared by refluxing in the presence of a trace of an acid catalyst 1,5-pentanediol with approximately stoichiometric quantities of furoic acid in the presence of a solvent The ester is there described as a colorless to pale amber oil-like material having a boiling point at 4 mm. Hg of about 240 C.-260 C.. a refractive index N 1.5118. a density Di 1,180 and a melting point of about 12 C.-15 C. y p

According to the present invention polyvinyl chloride or polyvinyl chloride in admixture with polyvinyl acetate is compounded with the loregoing ester according to thepractice usual in the art.

The following example illustrates the invention:

Exanwle A commercial polyvinyl resin (76.05 grams), known as Geon 101 and composed mainly or wholly of polyvinyl chloride, was mixed together with lead carbonate (1.24 grams) and stearic acid (0.59 grams) in the dry state by ball mill- Number 2 sheet of about 0.010 inch. Milling times were about 6 minutes to 2 minutes respectively. This thin sheet (0.010") furnished material for volatility and water extraction tests. After five minutes preheating at 160 C. the rough sheet was molded for 10 minutes at 1500 lbs/sq. in. in a 5%"square steel mold to give a smooth sheet about 0.045" thick. This sheet (0.045") furnished material for tensile strength; modulus, elongation, brittle point, heat stability and Shore hardness tests. Test results were as follows:

Volatility (weight loss at 100 c.-s

hours) percent 0.14 Water extraction (weight loss in water after l. A process of plasticizing a polyvinyl chloride resin which comprises the step of milling together said resin with 1,5-pentanediol difuroate as plasticizer.

2. A composition comprising a polyvinyl chloride resin plasticized with 1,5-pentanediol difuroate. I

STANFORD J. HETZEL.

REFERENCES CITED The following references are of record in the file of this patent:

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2. A COMPOSITION COMPRISING A POLYVINYL CHLORIDE RESIN PLASTICIZED WITH 1,5-PENTANEDIOL DIFUROATE. 